Error Code: 137 | Exporting executions download | We have encountered with some minor issue

The below snippets returned with 200 status code containing the Execution Id

BASE_URL = 'https://prod-api.zephyr4jiracloud.com/connect'

# RELATIVE PATH for token generation and make request to api
RELATIVE_PATH = '/public/rest/api/1.0/executions/export'

CANONICAL_PATH = 'POST&'+RELATIVE_PATH+'&'

After passing Execution ID to API '/public/rest/api/1.0/executions/export/download/' 

 Getting 

<Response [500]>
{
    "clientMessage": "We have encountered with some minor issue. Please try again.",
    "errorCode": 137,
    "errorType": "ERROR"
}

 Complete Snippets:

import json
import jwt
import time
import hashlib
import requests


def is_json(data):
    try:
        json.loads(data)
    except ValueError:
        return False
    return True


# USER
ACCOUNT_ID = 'xxxxxxxxxxxxxxxxxxxxxxxxxxxx'

# ACCESS KEY from navigation >> Tests >> API Keys
ACCESS_KEY = 'xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx'

# ACCESS KEY from navigation >> Tests >> API Keys
SECRET_KEY = 'xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx'

# JWT EXPIRE how long token been to be active? 3600 == 1 hour
JWT_EXPIRE = 3600

# BASE URL for Zephyr for Jira Cloud
BASE_URL = 'https://prod-api.zephyr4jiracloud.com/connect'
fileName = '0001677994347309-242ac113-0001'


# RELATIVE PATH for token generation and make request to api
RELATIVE_PATH = '/public/rest/api/1.0/executions/export/download/' + fileName
CANONICAL_PATH = 'GET&'+RELATIVE_PATH+'&'

# TOKEN HEADER: to generate jwt token
payload_token = {
            'sub': ACCOUNT_ID,
            'qsh': hashlib.sha256(CANONICAL_PATH.encode('utf-8')).hexdigest(),
            'iss': ACCESS_KEY,
            'exp': int(time.time())+JWT_EXPIRE,
            'iat': int(time.time())
        }

# GENERATE TOKEN
token = jwt.encode(payload_token, SECRET_KEY, algorithm='HS256').strip() #.decode('utf-8')

# REQUEST HEADER: to authenticate and authorize api
headers = {
            'Authorization': 'JWT '+token,
            'Content-Type': 'application/json',
            'zapiAccessKey': ACCESS_KEY
        }

cycle = {
            'fileName': '0001677994347309-242ac113-0001'
        }


# MAKE REQUEST:
raw_result = requests.get(BASE_URL + RELATIVE_PATH, headers=headers, json=cycle)
print(raw_result)